CEMENTING CASING STRINGS IN DEEP WATER OFFSHORE WELLS

摘要

The present invention provides improved methods of cementing casing strings indeepwater offshore formations penetrated by well bores. The methods are basicallycomprised ofthe steps of preparing a cement composition having a short transition timecomprised ofhydraulic cement, a water reducing additive, a dispersing additive, acompressive strengthenhancing and set retarding additive, a set accelerating additive and water,placing the cementcomposition in the annulus between the casing string and the well bore andallowing thecement composition to set into a hard impermeable mass.